Standardize usage of virtual/override/final in media/

media/cast/net/rtcp/rtcp_unittest.cc

Index: media/cast/net/rtcp/rtcp_unittest.cc
diff --git a/media/cast/net/rtcp/rtcp_unittest.cc b/media/cast/net/rtcp/rtcp_unittest.cc
index f0e5602b81b185c7d2e80b23690adb462fe57caa..9363f7062ae7005833b266f430b7f9b900fc7871 100644
--- a/media/cast/net/rtcp/rtcp_unittest.cc
+++ b/media/cast/net/rtcp/rtcp_unittest.cc
@@ -32,23 +32,20 @@ class FakeRtcpTransport : public PacedPacketSender {
   base::TimeDelta packet_delay() const { return packet_delay_; }
   void set_packet_delay(base::TimeDelta delay) { packet_delay_ = delay; }
 
-  virtual bool SendRtcpPacket(uint32 ssrc, PacketRef packet) override {
+  bool SendRtcpPacket(uint32 ssrc, PacketRef packet) override {
     clock_->Advance(packet_delay_);
     rtcp_->IncomingRtcpPacket(&packet->data[0], packet->data.size());
     return true;
   }
 
-  virtual bool SendPackets(const SendPacketVector& packets) override {
-    return false;
-  }
+  bool SendPackets(const SendPacketVector& packets) override { return false; }
 
-  virtual bool ResendPackets(
-      const SendPacketVector& packets, const DedupInfo& dedup_info) override {
+  bool ResendPackets(const SendPacketVector& packets,
+                     const DedupInfo& dedup_info) override {
     return false;
   }
 
-  virtual void CancelSendingPacket(const PacketKey& packet_key) override {
-  }
+  void CancelSendingPacket(const PacketKey& packet_key) override {}
 
  private:
   base::SimpleTestTickClock* const clock_;
@@ -61,12 +58,12 @@ class FakeRtcpTransport : public PacedPacketSender {
 class FakeReceiverStats : public RtpReceiverStatistics {
  public:
   FakeReceiverStats() {}
-  virtual ~FakeReceiverStats() {}
+  ~FakeReceiverStats() override {}
 
-  virtual void GetStatistics(uint8* fraction_lost,
-                             uint32* cumulative_lost,
-                             uint32* extended_high_sequence_number,
-                             uint32* jitter) override {
+  void GetStatistics(uint8* fraction_lost,
+                     uint32* cumulative_lost,
+                     uint32* extended_high_sequence_number,
+                     uint32* jitter) override {
     *fraction_lost = 0;
     *cumulative_lost = 0;
     *extended_high_sequence_number = 0;